“The closest you'll get to drinking on the field”

Lying beneath the bleachers in center field, a few feet from Ted Williams Red Seat, is newest addition to Fenway. A unique bar, where the patrons are treated to not only great food and drink, but an unprecedented baseball experience. With a window that looks directly through centerfield and into the park, it is the only view of its kind.
We would like to welcome you to Fenway’s newest annex, a place where you can not only relax and an enjoy and extraordinary bar experience, but a place where you can feel the very history that is Fenway Park.
Welcome to Bleacher Bar.

You can literally see through the outfield fence and onto the field, at this bar. That's enough for this place to be worthy of at least peeking into while you're in the area. The prices are pretty reasonable, too, given its location and huge draw.